Nannotax3 - ntax_cenozoic - Tisochrysis


Classification: ntax_cenozoic -> Isochrysidales -> Isochrysidaceae -> Tisochrysis
Sister taxa: Dicrateria, Isochrysis, Ruttnera, Tisochrysis

Daughter taxa (time control age-window is: 0-800Ma)
Tisochrysis lutea


Citation: Tisochrysis Bendif & Probert, in Bendif et al. 2013
Rank: Genus
Type species: Tisochrysis lute Bendif & Probert, in Bendif et al. 2013
Taxonomic discussion: The genus was created in order to avoid making Isochrysis a paraphyletic genus.

Distinguishing features:
Parent taxon (Isochrysidaceae): Non-calcifying Isochrysidales
This taxon: Similar to Isochrysis, but plastids orange rather than brown.

Original description: Cells solitary, motile, covered by several layers of scales with ten radiating ribs arranged in each of four quadrants. Flagella two, equal, inserted apically with abbre- viated haptonema between, bearing small round scales with 12 radial ridges. Plastid single, parietal, yellow-brown with immersed pyrenoid. Asexual reproduction by division in motile and non-motile stages. Nucleotide sequences of nuclear SSU and LSU rDNA and cox1 gene are distinctive from previously described isochrysidalean taxa.

Farinacci & Howe catalog pages: Tisochrysis



Search data:
Lith size: 0->0┬Ám;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within (-Ma, top in "Holocene" stage). Data source:
First occurrence (base): within (-Ma, base in "Holocene" stage). Data source:

Plot of occurrence data:


Bendif, E. M., Probert, I, Schroeder, D. C. & de Vargas, C. (2013b). On the description of Tisochrysis lutea gen. nov. sp. nov. and Isochrysis nuda sp. nov. in the Isochrysidales, and the transfer of Dicrateria to the Prymnesiales (Haptophyta). Journal of Applied Phycology. 25: 1763-1776. gs


Tisochrysis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-9-2022

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Short stable page link: Go to to create a permanent copy of this page - citation notes

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